| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5d7576285d411d00c697e07270d2814a |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01R19-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01R31-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01C7-12 |
| filingDate |
1999-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_70b038a2ffecd04a7a1651e7a66f8086
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d339952d8aa855d0f80df80f2a49bf23 |
| publicationDate |
2000-10-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-2000275294-A |
| titleOfInvention |
Leakage current detector for zinc oxide surge arrester |
| abstract |
(57) [Problem] A conventional leakage current (resistance current) detection device of a zinc oxide arrester measures a small harmonic in the leakage current and solves a higher-order equation based on the measurement. Was The accuracy of leakage current measurement was low because it was difficult to solve higher-order equations and it was not possible to measure harmonics with high accuracy. SOLUTION: An effective value calculation circuit 11 for a leakage current, a peak value detection circuit 12, and a waveform ratio calculation circuit 14 based on these are provided. A peak phase detection circuit 13 for determining whether the angle position of the peak value is within 90 degrees or more is provided. From the determination result and the waveform ratio, the first n-value calculation circuit 15 determines the ratio n of the current value to the initial value of the resistance component current. The first resistance current peak value calculation circuit 17 multiplies the initial resistance current peak value of the surge arrester measured in advance by n to obtain the resistance current peak value. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102841234-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2022014757-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104360197-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104090142-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104181428-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107167693-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113366327-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113366327-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106483360-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103364696-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2020256221-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2022237319-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102721850-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2014139381-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102262171-A |
| priorityDate |
1999-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |